$ git clone -n https://src.fedoraproject.org/rpms/perl-Perl-Tags.git /var/lib/mock/f45-build-25783-613/root/chroot_tmpdir/scmroot/perl-Perl-Tags
Cloning into '/var/lib/mock/f45-build-25783-613/root/chroot_tmpdir/scmroot/perl-Perl-Tags'...
$ git fetch origin 989ea0d5c1eb69dbb70c601861979b8c09d9ad11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Perl-Tags
 * [new ref]         989ea0d5c1eb69dbb70c601861979b8c09d9ad11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 989ea0d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild